android.app.ActivityManager.RunningAppProcessInfo#IMPORTANCE_VISIBLE源码实例Demo

public static void cleanMemory(Context context){
    System.out.println("---> 清理前可用内存:"+getAvailMemory(context)+"MB");
    ActivityManager activityManager=(ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);

    List<ActivityManager.RunningAppProcessInfo> processList = activityManager.getRunningAppProcesses();

    if (processList != null) {
        for (int i = 0; i < processList.size(); ++i) {
            RunningAppProcessInfo runningAppProcessInfo= processList.get(i);
            // 一般数值大于RunningAppProcessInfo.IMPORTANCE_SERVICE
            // 的进程即为长时间未使用进程或者空进程
            // 一般数值大于RunningAppProcessInfo.IMPORTANCE_VISIBLE
            // 的进程都是非可见进程,即在后台运行
            if (runningAppProcessInfo.importance > RunningAppProcessInfo.IMPORTANCE_VISIBLE) {
                String[] pkgList = runningAppProcessInfo.pkgList;
                for (int j = 0; j < pkgList.length; ++j) {
                    System.out.println("===> 正在清理:"+pkgList[j]);
                    activityManager.killBackgroundProcesses(pkgList[j]);
                }
            }

        }
    }
    System.out.println("---> 清理后可用内存:"+getAvailMemory(context)+"MB");
}
 

private void bind(final int position) {
	final ProcessInfo pi = lpinfo.get(position);

	cbx.setTag(pi);
	more.setTag(pi);

	name.setText(pi.label);
	attr.setText(pi.packageName);
	items.setText(Util.nf.format(pi.size) + " B");

	int importance = pi.status;
	if (importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
		type.setText("Foreground");
	} else if (importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND_SERVICE) {
		type.setText("Foreground Service");
	} else if (importance == RunningAppProcessInfo.IMPORTANCE_BACKGROUND) {
		type.setText("Background");
	} else if (importance == RunningAppProcessInfo.IMPORTANCE_VISIBLE) {
		type.setText("Visible");
	} else if (importance == RunningAppProcessInfo.IMPORTANCE_PERCEPTIBLE) {
		type.setText("Perceptible");
	} else if (importance == RunningAppProcessInfo.IMPORTANCE_SERVICE) {
		type.setText("Service");
	} else if (importance == 150) {//}RunningAppProcessInfo.IMPORTANCE_TOP_SLEEPING) {
		type.setText("Sleep");
	} else if (importance == RunningAppProcessInfo.IMPORTANCE_GONE) {
		type.setText("Gone");
	} else if (importance == RunningAppProcessInfo.IMPORTANCE_CANT_SAVE_STATE) {
		type.setText("Can't save state");
	} else if (importance == RunningAppProcessInfo.IMPORTANCE_EMPTY) {
		type.setText("Empty");
	}

	try {
		image.setImageDrawable(pk.getApplicationIcon(pi.packageName));
	} catch (NameNotFoundException e) {
		image.setImageResource(R.drawable.ic_doc_apk);
	}

	final boolean checked = selectedInList1.contains(pi.packageName);
	if (checked) {
		ll.setBackgroundColor(Constants.IN_DATA_SOURCE_2);
		cbx.setSelected(true);
		cbx.setImageResource(R.drawable.ic_accept);
	} else if (selectedInList1.size() > 0) {
		ll.setBackgroundColor(Constants.BASE_BACKGROUND);
		cbx.setSelected(false);
		cbx.setImageResource(R.drawable.ready);
	} else {
		ll.setBackgroundResource(R.drawable.ripple);
		cbx.setSelected(false);
		cbx.setImageResource(R.drawable.dot);
	}
}
 

private void runProcessGC() {
    if (mHostContext == null) {
        return;
    }
    ActivityManager am = (ActivityManager) mHostContext.getSystemService(Context.ACTIVITY_SERVICE);
    if (am == null) {
        return;
    }

    List<RunningAppProcessInfo> infos = am.getRunningAppProcesses();
    List<RunningAppProcessInfo> myInfos = new ArrayList<RunningAppProcessInfo>();
    if (infos == null || infos.size() < 0) {
        return;
    }

    List<String> pns = mStaticProcessList.getOtherProcessNames();
    pns.add(mHostContext.getPackageName());
    for (RunningAppProcessInfo info : infos) {
        if (info.uid == android.os.Process.myUid()
                && info.pid != android.os.Process.myPid()
                && !pns.contains(info.processName)
                && mRunningProcessList.isPlugin(info.pid)
                && !mRunningProcessList.isPersistentApplication(info.pid)
                /*&& !mRunningProcessList.isPersistentApplication(info.pid)*/) {
            myInfos.add(info);
        }
    }
    Collections.sort(myInfos, sProcessComparator);
    for (RunningAppProcessInfo myInfo : myInfos) {
        if (myInfo.importance == RunningAppProcessInfo.IMPORTANCE_GONE) {
            doGc(myInfo);
        } else if (myInfo.importance == RunningAppProcessInfo.IMPORTANCE_EMPTY) {
            doGc(myInfo);
        } else if (myInfo.importance == RunningAppProcessInfo.IMPORTANCE_BACKGROUND) {
            doGc(myInfo);
        } else if (myInfo.importance == RunningAppProcessInfo.IMPORTANCE_SERVICE) {
            doGc(myInfo);
        } /*else if (myInfo.importance == RunningAppProcessInfo.IMPORTANCE_CANT_SAVE_STATE) {
            //杀死进程，不能保存状态。但是关我什么事？
        }*/ else if (myInfo.importance == RunningAppProcessInfo.IMPORTANCE_PERCEPTIBLE) {
            //杀死进程
        } else if (myInfo.importance == RunningAppProcessInfo.IMPORTANCE_VISIBLE) {
            //看得见
        } else if (myInfo.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
            //前台进程。
        }
    }

}